Added changes to WallpaperPreviewer for sending the current state in the am: 43b6f49bfa am: b32f477b1b

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/ThemePicker/+/24749074

Change-Id: I9b089d7fabadd81da62dd791dc1b806ac8bfc23c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>